Product Compare
AMD Radeon Instinct MI455X vs AMD Radeon RX 6600 XT
| GPU | GPU | |
|---|---|---|
| Graphics Card | ||
| Release Date | Jul 2026 | Jul 2021 |
| Generation | Radeon Instinct | Navi II |
| Type | Desktop | Desktop |
| Bus Interface | PCIe 6.0 x16 | PCIe 4.0 x8 |
| Clock Speeds | ||
| Base Clock | 1000 MHz | 1968 MHz |
| Boost Clock | 2400 MHz | 2589 MHz |
| Memory Clock | 1900 MHz | 2000 MHz |
| Memory | ||
| Memory Size | 432GB | 8GB |
| Memory Type | HBM4 | GDDR6 |
| Memory Bus | 24576bit | 128bit |
| Bandwidth | 23.3TB/s | 256.0GB/s |
| Render Config | ||
| Compute Units | 256 | 32 |
| Shading Units | 32768 | 2048 |
| TMUs | 1024 | 128 |
| ROPs | 0 | 64 |
| L1 Cache | 32 KB (per CU) | 128 KB per Array |
| L2 Cache | 192 MB | 2 MB |
| RT Cores | 32 | |
| L3 Cache | 32 MB | |
| Theoretical Performance | ||
| Pixel Rate | 0 MPixel/s | 165.7 GPixel/s |
| Texture Rate | 2457.6 GTexel/s | 331.4 GTexel/s |
| FP16 (half) | 157.3 TFLOPS | 21.21 TFLOPS |
| FP32 (float) | 157.3 TFLOPS | 10.60 TFLOPS |
| FP64 (double) | 2.458 TFLOPS | 662.8 GFLOPS |
| Graphics Processor | ||
| GPU Name | MI450 256CU | Navi 23 |
| Architecture | CDNA 5.0 | RDNA 2.0 |
| Foundry | TSMC | TSMC |
| Process Size | 2 nm | 7 nm |
| Transistors | 320 billion | 11.06 billion |
| Die Size | Unknown | 237 mm² |
| GPU Variant | Navi 23 XT(215-130000006) | |
| Board Design | ||
| TDP | 2300W | 160W |
| Suggested PSU | 2700 W | 450 W |
| Outputs | No outputs | 1x HDMI 2.13x DisplayPort 1.4a |
| Power Connectors | None | 1x 8-pin |
| Graphics Features | ||
| DirectX | N/A | 12 Ultimate (12_2) |
| OpenGL | N/A | 4.6 |
| OpenCL | 3.0 | 2.1 |
| Vulkan | N/A | 1.3 |
| Shader Model | N/A | 6.7 |